﻿ how to use prime factorization to find gcf and lcm

# how to use prime factorization to find gcf and lcm

To find the GCF and LCM you first must know how to write out factor trees.When finished I write all the circled numbers together in a prime factorization. If you have multiples of any number, use exponents to group them together. 2 In this lesson you will learn how to find the GCF and LCM of two whole numbers by using their prime factors.6 Remembering to find only prime factors for a number when using prime factorization. The prime factors of 20 are 2 x 10. I saw in a book that we can find the LCM and GCD of three numbers using prime factorization . That was really cool :) Ill explain what i saw and will let you know my doubt in the end! Description. Slide 1 Prime Factorization Used to find the LCM and GCF to help us add and subtract fractions. Slide 2 Factors A factor is a number that divides another number with no remainder. Youll gain access to interventions, extensions, task implementation guides, and more for this instructional video. In this lesson you will learn how to find the GCF and LCM of two whole numbers by using their prime factors. Students then find the greatest common factor (GCF) and least common multiple (LCM) of two composite numbers.This lesson focuses on finding the prime factorization for composite numbers, and using it to find the GCF, LCM, and LCD. 1. Create prime factor tree for each number. 2. Write list of prime factors from least to.(includes all the numbers!) 1.

2. 3. 4. Using prime factorization to find GCF. 1. Make prime factor trees for each number. A straight forward way to find the greatest common factor (GCF) and least common multiple (LCM) using prime factorization.I. To Find the GCF. GCF stands for Greatest Common Factor. Factors are numbers multiplied together.